Kevin... I wouldn't worry too much about the component details on the Mega Mosquito. I remember your question about "race specifics" and I'm not sure we answered that. It's not a real "race", per se - it's more done just for the fun and spectacle of the simultaneous M.Mosquito launch. There's no formal "winner", so the fine specs of construction aren't all that important. Some are original Estes kits, some are people's own clone attempt, some are mfgr. clone kits, and at least one is a 3D printed repro. They all look the same... and we try to keep 'em all on D12-3's for the race, unless there's extenuating circumstances. So your options are wide open.
With a reissue imminent, I'm willing to sell by back up kit. I could do it for $30, plus the postage. If you're interested, drop me a line at skylakerob@yahoo.com.